Patent GB-190619076-A (GB)
Title: Improvements in Ruffling and Stitching Machines.
Inventor: FAIRWEATHER WALLACE
Filed: 1906-08-27
Granted: 1906-12-06
Abstract: 19,076. Fairweather, W., [Singer Manufacturing Co.]. Aug. 27, Ruffling-machines.-The ruffling-blade 17, Fig. 2, is actuated, through links 19, 21, 22, by a block adjustably secured to a lever 25 on a shaft 27. The shaft 27 carries a lever 28, Fig. 3, which is oscillated intermittently by a cam-actuated lever 35, as follows : The lever 35 is provided at its lower end with two stops 40, 41 ; when the latch 32 pivoted to the lever 28 is down, the stops engage with a projection 33 on the latch and a pin 29 on the lever 28 ; when the latch is raised, the lever 28 is disengaged. The latch is raised against a spring 34 by a lever 43 when a bowl 47, attached to it, is raised by a cam-wheel 48. It is held in a raised position by a latch 50. The number of ruffling-stitches made depends upon the distance between the shoulders 70, 72 of the cam-wheel. To vary this the camwheel is made in two parts 48, 49, which may be moved relatively by means of levers 73, 76, Fig. 3, secured to the bosses of the parts 48, 49. A. ratchet-wheel 57, Fig. 9, is continuously rotated by worm gear 64, 63, 62, and the camwheel is rotated with it when a pawl 78, pivoted to the part 48, is in engagement with the ratchet teeth. A lever 84, also pivoted to the cam-wheel, controls the position of the pawl by a pin 90 on to which it is pressed by a spring, and is itself held in position by a spring block 86. The cam-wheel is carried round until a tripping-plate 110 engages the cam-head 80 (shown partly broken) of the lever 84 and rotates it, thereby lifting the pawl 78. At the same time, a latch 101 slips under a catch 111 and anchors the cam-plate. During this movement, the toothed boss of the cam-plate part 48 has traversed a rack 115, Fig. 3, slidingly mounted on the bar 112 and thereby extended a spring, contained in the hollow rack block and confined between it and the head of a bar 119 secured to the bar 112. The latch 111 is carried by the bar 112 and the cam-wheel can be freed by an endlong movement of the bar 112. When this is done, the extended spring actuates the rack and rotates the cam plate towards its initial position, which is determined by a pin 92 against which the rear of the cam-head 80 impinges so as to rotate its lever 84 and raise the pawl 78. The pin is mounted on an independent disk which may be rotated by a band worm-gear 95, 96. The bar 112 is actuated by the usual knee-plate device 127 for raising the presser-foot, Fig. 19. The rod 129 carries a foot 136, and when the rod is depressed it carries with it an arm 137 of a bell-crank lever, the other arm 139 of which actuates the rod 112. The device is adjusted so that the feed-wheel can be freed without raising the presser. By means of the latch 101, the distance between successive sets of ruffling stitches is made dependent upon the movement of the knee-plate 122. If this is not desired, the latch cm be withdrawn by a lever, a pin on which engages a slot in the latch ; the spacing is then entirely dependent upon the position of the pin 92. An index 97 is provided in connexion with the worm gear actuating the disk to indicate the position of the pin 92. The stitch-forming mechanism is the same as that described in Specification No. 15,663, A.D. 1887, and the feeddevices are of the same type but slightly modified.